I'm using Register Plus Redux 3.9.10 on WordPress 3.9.
We've been getting messages from people saying that they are unable to verify their accounts.
When attempting to verify (by either clicking the link in their email, or manually copy/pasting it) they get an error saying "Invalid verification code."
The verification code is their chosen password if I'm not mistaken, and it only seems to happen if they have some special characters in the password. I've tested with both ! and # and they both caused the error. Using a plain alphanumeric password works fine.